<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="itme of hot" :key="itme.id" @click="handleCityClick(itme.name)">
            <div class="button">{{ itme.name }}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(itme , key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div class="itme-list">
          <div class="itme border-bottom" v-for="innerItme of itme" :key="innerItme.id" @click="handleCityClick(innerItme.name)">{{ innerItme.name }}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  mounted () {
    this.scroll = new BScroll('.list')
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.border-topbottom&:before{
  border-color:#ccc;
}
.border-topbottom&:after{
  border-color:#ccc;
}
.border-bottom&::before{
  border-color:#ccc;
  border-width:0.06rem;
}
.list{
  position:absolute;
  top:1.58rem;
  bottom:0;
  left:0;
  right:0;
  overflow:hidden;
}
.title{
  line-height:0.54rem;
  background:#eee;
  padding-left:0.2rem;
  color:#666;
  font-size:0.26rem;
}
.button-list{
  padding:0.1rem 0.6rem 0.1rem 0.1rem;
  overflow:hidden;
}
.button-wrapper{
  width:33.33%;
  float:left;
}
.button{
  margin:0.1rem;
  padding:0.1rem 0;
  text-align:center;
  border:0.02rem solid #ccc;
  border-radius:0.06rem;
}
.itme-list{
  line-height:0.54rem;
  color:#666;
}
.itme{
  padding-left:0.2rem;
  margin-right: 0.4rem;
}
</style>
